Pennsylvania Dams
1,481 dams tracked by the National Inventory of Dams
Total Dams
1,481
High Hazard
780
52.7%
Poor / Unsatisfactory
215
Average Age
80 yrs
Hazard Classification
High780 (52.7%)
Significant310 (20.9%)
Low378 (25.5%)
Condition Assessment
Satisfactory415 (28.0%)
Fair547 (36.9%)
Poor / Unsatisfactory215 (14.5%)
Not Rated304 (20.5%)
Federal
57
State
152
Local
351
Private
911
Tallest Dams
- Harmar Refuse Bank410 ft
- Little Blue Run400 ft
- Cumberland No. 1 Slurry Pond 1380 ft
- Cumberland No. 2 Slurry Pond370 ft
- Bailey Mine Area No. 3 Slurry337 ft
High Hazard Dams
Poor Condition Dams
- Little Pine CreekPoor
- North ForkPoor
- DehartPoor
- Mill RunPoor
- West Newton SludgeUnsatisfactory
All Dams in Pennsylvania
Showing 1126–1150 of 1,481
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Reservoir No 4 Cambria County | 18 | 1993 | Significant | Not Rated |
| Reservoir No 5 Cambria County | 20 | 1993 | Significant | Not Rated |
| Reservoir No 7 Wayne County | 13 | 1852 | Significant | Fair |
| Resting Waters Gsc McKean County | 15 | 1977 | Low | Not Available |
| Reynolds Pond Susquehanna County | 26 | 1972 | Low | Not Available |
| Reynoldsville Storage #4 Jefferson County | 16 | 1961 | High | Fair |
| Reynoldsville Storage #5 Jefferson County | 26 | 1901 | High | Poor |
| R G Struble Lake (Pa-431) Chester County | 31 | 1971 | High | Satisfactory |
| Richardson Washington County | 26 | 1976 | High | Satisfactory |
| Richland Crossing Detention Bucks County | 9 | 1999 | Significant | Fair |
| Rickard Wayne County | 8 | — | Low | Poor |
| Ridgebury Lake Bradford County | 35 | 1973 | High | Fair |
| Ridge Lake Wayne County | 10 | — | Significant | Poor |
| Ridilla Upper Pond A Westmoreland County | 15 | — | Significant | Fair |
| Ridley Park Lake Delaware County | 15 | 1998 | High | Satisfactory |
| Rinehart Montgomery County | 12 | 1988 | Significant | Satisfactory |
| Ringtown No 5 Schuylkill County | 62 | 1914 | High | Poor |
| Ringtown Reservoir No 6 Schuylkill County | 50 | 1921 | High | Fair |
| Roamingwood Lake Wayne County | 32 | 1971 | High | Satisfactory |
| Robena Pond No 6 Greene County | 115 | 1980 | Low | Satisfactory |
| Robena Slurry Pond No 4 Greene County | 135 | 1955 | Low | Satisfactory |
| Robert Christman Monroe County | 13 | — | High | Unsatisfactory |
| Robin Run (Pa-612) Bucks County | 46 | 1971 | High | Fair |
| Robinson Fork (Pa-647) Washington County | 95 | 1977 | High | Satisfactory |
| Rock Airport Allegheny County | 11 | — | Significant | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.